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Proceedings Paper

Use of acousto-optical resonant conditions in GaAs and InP for the creation of high-efficiency 2-GHz bandwidth Bragg cells
Author(s): Vladimir V. Petrov; Boris Gurev; Vjacheslav Kolosov; Sergey Kuryshov; Sergey A. Lapin; Jacques Sapriel
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Paper Abstract

We demonstrated in this work the possibility of application of the effect of resonant acousto- optical (AO) interaction for the creation of wide band and high efficiency Bragg cells on gigahertz frequencies. The main principle of this effect consists in heat there exists the optimum photon energy (very close to the band gap of semiconductor sample) where the optical absorption is still not big enough but the figure of merit already several times higher in comparison with one when the photon energy is fat from the band gap. We have shown theoretically that the optimization of multilayer thin film piezoelectric transducers allows to create AO Bragg cells (deflectors and modulators) working in resonant conditions and having very high diffraction efficiency (more than 10%) and very wide frequency band (up to 2 GHz). This optimization based on the use of the acoustical matching scheme-asynchronous transform, analogous to one in electrotechnics. Experimental devices represent the cells with crystal plates of GaAs and InP of (100) and (110) cut having the multilayer thin film transducer on the butt-end that has been matched with microstrip transmission line. Characteristics of created AO cells reach: 10% per 1 Watt of electrical power; 2 GHz frequency band with 8 MHz frequency resolution. The obtained experimental results show a good agreement with theoretical predictions.

Paper Details

Date Published: 4 October 1995
PDF: 7 pages
Proc. SPIE 2643, Acousto-Optics and Applications II, (4 October 1995); doi: 10.1117/12.222744
Show Author Affiliations
Vladimir V. Petrov, Saratov State Univ. (Russia)
Boris Gurev, Saratov State Univ. (Russia)
Vjacheslav Kolosov, Saratov State Univ. (Russia)
Sergey Kuryshov, Saratov State Univ. (Russia)
Sergey A. Lapin, Saratov State Univ. (Russia)
Jacques Sapriel, Ctr. National d'Etudes des Telecommunications (France)


Published in SPIE Proceedings Vol. 2643:
Acousto-Optics and Applications II
Antoni Sliwinski; Piotr Kwiek; Bogumil B. J. Linde; A. Markiewicz, Editor(s)

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